Searching for DME + H2O Boiling Point Curve: Help Needed

[katchum]

I've been searching for a DME + H2O boiling point composition curve. Can someone help me here or give me a clue how to calculate the curve?

 

[Borek]

These things are determined experimentally, so you have to search literature.

 

[katchum]

I think I saw once that there was a program where you would input molecules and magically you could get a component curve out of it.

It could be that they were using correlations to set up this component curve based on activity coefficients, isn't this true?

It has been 5 years now, so my mind is blurry at this moment.

Edit: I remember things like Uniquac, unifac, nrtl and you had to use one of them specifically when dealing with a certain mixture. But I forgot it all by now... I'll have to dig it up again.

 

[katchum]

Just to update the status: I've found a free software VLE calculator tool where you can input Antoine coefficients, molecular weight and density of the components. You can then calculate the composition curves with UNIFAC. It's a pretty awesome thing to use!

 

[Borek]

tool where you can input Antoine coefficients, molecular weight and density of the components

Coefficients are found experimentally and Antoine equation usually doesn't work for the entire pressure/temperature range. In other words - coefficients itself are temperature dependent. So you better treat results of these calculations with care. But they are better than nothing